1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
12 /* for the given bus number, return the CSR for reading an i2c line */
18 /* for the given bus number, return the CSR for writing an i2c line */
26 	struct hfi1_i2c_bus *bus = (struct hfi1_i2c_bus *)data;  in hfi1_setsda()  local
27 	struct hfi1_devdata *dd = bus->controlling_dd;  in hfi1_setsda()
31 	target_oe = i2c_oe_csr(bus->num);  in hfi1_setsda()
50 	struct hfi1_i2c_bus *bus = (struct hfi1_i2c_bus *)data;  in hfi1_setscl()  local
51 	struct hfi1_devdata *dd = bus->controlling_dd;  in hfi1_setscl()
55 	target_oe = i2c_oe_csr(bus->num);  in hfi1_setscl()
74 	struct hfi1_i2c_bus *bus = (struct hfi1_i2c_bus *)data;  in hfi1_getsda()  local
81 	target_in = i2c_in_csr(bus->num);  in hfi1_getsda()
82 	reg = read_csr(bus->controlling_dd, target_in);  in hfi1_getsda()
88 	struct hfi1_i2c_bus *bus = (struct hfi1_i2c_bus *)data;  in hfi1_getscl()  local
95 	target_in = i2c_in_csr(bus->num);  in hfi1_getscl()
96 	reg = read_csr(bus->controlling_dd, target_in);  in hfi1_getscl()
101  * Allocate and initialize the given i2c bus number.
107 	struct hfi1_i2c_bus *bus;  in init_i2c_bus()  local
110 	bus = kzalloc(sizeof(*bus), GFP_KERNEL);  in init_i2c_bus()
111 	if (!bus)  in init_i2c_bus()
114 	bus->controlling_dd = dd;  in init_i2c_bus()
115 	bus->num = num;	/* our bus number */  in init_i2c_bus()
117 	bus->algo.setsda = hfi1_setsda;  in init_i2c_bus()
118 	bus->algo.setscl = hfi1_setscl;  in init_i2c_bus()
119 	bus->algo.getsda = hfi1_getsda;  in init_i2c_bus()
120 	bus->algo.getscl = hfi1_getscl;  in init_i2c_bus()
121 	bus->algo.udelay = 5;  in init_i2c_bus()
122 	bus->algo.timeout = usecs_to_jiffies(100000);  in init_i2c_bus()
123 	bus->algo.data = bus;  in init_i2c_bus()
125 	bus->adapter.owner = THIS_MODULE;  in init_i2c_bus()
126 	bus->adapter.algo_data = &bus->algo;  in init_i2c_bus()
127 	bus->adapter.dev.parent = &dd->pcidev->dev;  in init_i2c_bus()
128 	snprintf(bus->adapter.name, sizeof(bus->adapter.name),  in init_i2c_bus()
131 	ret = i2c_bit_add_bus(&bus->adapter);  in init_i2c_bus()
133 		dd_dev_info(dd, "%s: unable to add i2c bus %d, err %d\n",  in init_i2c_bus()
135 		kfree(bus);  in init_i2c_bus()
139 	return bus;  in init_i2c_bus()
144  * Return 0 on success, -errno on error.
148 	ad->i2c_bus0 = init_i2c_bus(dd, ad, 0);  in set_up_i2c()
149 	ad->i2c_bus1 = init_i2c_bus(dd, ad, 1);  in set_up_i2c()
150 	if (!ad->i2c_bus0 || !ad->i2c_bus1)  in set_up_i2c()
151 		return -ENOMEM;  in set_up_i2c()
155 static void clean_i2c_bus(struct hfi1_i2c_bus *bus)  in clean_i2c_bus()  argument
157 	if (bus) {  in clean_i2c_bus()
158 		i2c_del_adapter(&bus->adapter);  in clean_i2c_bus()
159 		kfree(bus);  in clean_i2c_bus()
167 	clean_i2c_bus(ad->i2c_bus0);  in clean_up_i2c()
168 	ad->i2c_bus0 = NULL;  in clean_up_i2c()
169 	clean_i2c_bus(ad->i2c_bus1);  in clean_up_i2c()
170 	ad->i2c_bus1 = NULL;  in clean_up_i2c()
185 		msgs[0].addr = slave_addr;  in i2c_bus_write()
197 		msgs[0].addr = slave_addr;  in i2c_bus_write()
202 		msgs[1].addr = slave_addr;  in i2c_bus_write()
208 		return -EINVAL;  in i2c_bus_write()
211 	i2c->controlling_dd = dd;  in i2c_bus_write()
212 	ret = i2c_transfer(&i2c->adapter, msgs, num_msgs);  in i2c_bus_write()
214 		dd_dev_err(dd, "%s: bus %d, i2c slave 0x%x, offset 0x%x, len 0x%x; write failed, ret %d\n",  in i2c_bus_write()
215 			   __func__, i2c->num, slave_addr, offset, len, ret);  in i2c_bus_write()
216 		return ret < 0 ? ret : -EIO;  in i2c_bus_write()
221 static int i2c_bus_read(struct hfi1_devdata *dd, struct hfi1_i2c_bus *bus,  in i2c_bus_read()  argument
233 		msgs[0].addr = slave_addr;  in i2c_bus_read()
245 		msgs[0].addr = slave_addr;  in i2c_bus_read()
250 		msgs[1].addr = slave_addr;  in i2c_bus_read()
256 		return -EINVAL;  in i2c_bus_read()
259 	bus->controlling_dd = dd;  in i2c_bus_read()
260 	ret = i2c_transfer(&bus->adapter, msgs, num_msgs);  in i2c_bus_read()
262 		dd_dev_err(dd, "%s: bus %d, i2c slave 0x%x, offset 0x%x, len 0x%x; read failed, ret %d\n",  in i2c_bus_read()
263 			   __func__, bus->num, slave_addr, offset, len, ret);  in i2c_bus_read()
264 		return ret < 0 ? ret : -EIO;  in i2c_bus_read()
270  * Raw i2c write.  No set-up or lock checking.
272  * Return 0 on success, -errno on error.
277 	struct hfi1_devdata *dd = ppd->dd;  in __i2c_write()
278 	struct hfi1_i2c_bus *bus;  in __i2c_write()  local
282 	bus = target ? dd->asic_data->i2c_bus1 : dd->asic_data->i2c_bus0;  in __i2c_write()
283 	slave_addr = (i2c_addr & 0xff) >> 1; /* convert to 7-bit addr */  in __i2c_write()
285 	return i2c_bus_write(dd, bus, slave_addr, offset, offset_size, bp, len);  in __i2c_write()
291  * Return number of bytes written, or -errno.
298 	if (!check_chip_resource(ppd->dd, i2c_target(target), __func__))  in i2c_write()
299 		return -EACCES;  in i2c_write()
309  * Raw i2c read.  No set-up or lock checking.
311  * Return 0 on success, -errno on error.
316 	struct hfi1_devdata *dd = ppd->dd;  in __i2c_read()
317 	struct hfi1_i2c_bus *bus;  in __i2c_read()  local
321 	bus = target ? dd->asic_data->i2c_bus1 : dd->asic_data->i2c_bus0;  in __i2c_read()
322 	slave_addr = (i2c_addr & 0xff) >> 1; /* convert to 7-bit addr */  in __i2c_read()
324 	return i2c_bus_read(dd, bus, slave_addr, offset, offset_size, bp, len);  in __i2c_read()
330  * Return number of bytes read, or -errno.
337 	if (!check_chip_resource(ppd->dd, i2c_target(target), __func__))  in i2c_read()
338 		return -EACCES;  in i2c_read()
349  * by writing @addr = ((256 * n) + m)
353  * Return number of bytes written or -errno.
355 int qsfp_write(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,  in qsfp_write()  argument
364 	if (!check_chip_resource(ppd->dd, i2c_target(target), __func__))  in qsfp_write()
365 		return -EACCES;  in qsfp_write()
369 		 * Set the qsfp page based on a zero-based address  in qsfp_write()
372 		page = (u8)(addr / QSFP_PAGESIZE);  in qsfp_write()
376 		/* QSFPs require a 5-10msec delay after write operations */  in qsfp_write()
379 			hfi1_dev_porterr(ppd->dd, ppd->port,  in qsfp_write()
385 		offset = addr % QSFP_PAGESIZE;  in qsfp_write()
386 		nwrite = len - count;  in qsfp_write()
388 		if (((addr % QSFP_RW_BOUNDARY) + nwrite) > QSFP_RW_BOUNDARY)  in qsfp_write()
389 			nwrite = QSFP_RW_BOUNDARY - (addr % QSFP_RW_BOUNDARY);  in qsfp_write()
393 		/* QSFPs require a 5-10msec delay after write operations */  in qsfp_write()
399 		addr += nwrite;  in qsfp_write()
408  * Perform a stand-alone single QSFP write.  Acquire the resource, do the
411 int one_qsfp_write(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,  in one_qsfp_write()  argument
414 	struct hfi1_devdata *dd = ppd->dd;  in one_qsfp_write()
421 	ret = qsfp_write(ppd, target, addr, bp, len);  in one_qsfp_write()
429  * by reading @addr = ((256 * n) + m)
433  * Return the number of bytes read or -errno.
435 int qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,  in qsfp_read()  argument
444 	if (!check_chip_resource(ppd->dd, i2c_target(target), __func__))  in qsfp_read()
445 		return -EACCES;  in qsfp_read()
449 		 * Set the qsfp page based on a zero-based address  in qsfp_read()
452 		page = (u8)(addr / QSFP_PAGESIZE);  in qsfp_read()
455 		/* QSFPs require a 5-10msec delay after write operations */  in qsfp_read()
458 			hfi1_dev_porterr(ppd->dd, ppd->port,  in qsfp_read()
464 		offset = addr % QSFP_PAGESIZE;  in qsfp_read()
465 		nread = len - count;  in qsfp_read()
467 		if (((addr % QSFP_RW_BOUNDARY) + nread) > QSFP_RW_BOUNDARY)  in qsfp_read()
468 			nread = QSFP_RW_BOUNDARY - (addr % QSFP_RW_BOUNDARY);  in qsfp_read()
476 		addr += nread;  in qsfp_read()
485  * Perform a stand-alone single QSFP read.  Acquire the resource, do the
488 int one_qsfp_read(struct hfi1_pportdata *ppd, u32 target, int addr, void *bp,  in one_qsfp_read()  argument
491 	struct hfi1_devdata *dd = ppd->dd;  in one_qsfp_read()
498 	ret = qsfp_read(ppd, target, addr, bp, len);  in one_qsfp_read()
518 	u32 target = ppd->dd->hfi1_id;  in refresh_qsfp_cache()
521 	u8 *cache = &cp->cache[0];  in refresh_qsfp_cache()
525 	spin_lock_irqsave(&ppd->qsfp_info.qsfp_lock, flags);  in refresh_qsfp_cache()
526 	ppd->qsfp_info.cache_valid = 0;  in refresh_qsfp_cache()
527 	spin_unlock_irqrestore(&ppd->qsfp_info.qsfp_lock, flags);  in refresh_qsfp_cache()
530 		ret = -ENODEV;  in refresh_qsfp_cache()
536 		dd_dev_info(ppd->dd,  in refresh_qsfp_cache()
549 				dd_dev_info(ppd->dd, "%s failed\n", __func__);  in refresh_qsfp_cache()
554 				dd_dev_info(ppd->dd, "%s failed\n", __func__);  in refresh_qsfp_cache()
559 				dd_dev_info(ppd->dd, "%s failed\n", __func__);  in refresh_qsfp_cache()
566 				dd_dev_info(ppd->dd, "%s failed\n", __func__);  in refresh_qsfp_cache()
571 				dd_dev_info(ppd->dd, "%s failed\n", __func__);  in refresh_qsfp_cache()
578 				dd_dev_info(ppd->dd, "%s failed\n", __func__);  in refresh_qsfp_cache()
583 				dd_dev_info(ppd->dd, "%s failed\n", __func__);  in refresh_qsfp_cache()
590 				dd_dev_info(ppd->dd, "%s failed\n", __func__);  in refresh_qsfp_cache()
596 	spin_lock_irqsave(&ppd->qsfp_info.qsfp_lock, flags);  in refresh_qsfp_cache()
597 	ppd->qsfp_info.cache_valid = 1;  in refresh_qsfp_cache()
598 	ppd->qsfp_info.cache_refresh_required = 0;  in refresh_qsfp_cache()
599 	spin_unlock_irqrestore(&ppd->qsfp_info.qsfp_lock, flags);  in refresh_qsfp_cache()
634 	 * balance to the off-by-1 offset above, we add 4 here to  in get_qsfp_power_class()
643 	struct hfi1_devdata *dd = ppd->dd;  in qsfp_mod_present()
646 	reg = read_csr(dd, dd->hfi1_id ? ASIC_QSFP2_IN : ASIC_QSFP1_IN);  in qsfp_mod_present()
654  * For addr 000-127, lower page 00h
655  * For addr 128-255, upper page 00h
656  * For addr 256-383, upper page 01h
657  * For addr 384-511, upper page 02h
658  * For addr 512-639, upper page 03h
665 int get_cable_info(struct hfi1_devdata *dd, u32 port_num, u32 addr, u32 len,  in get_cable_info()  argument
672 	if (port_num > dd->num_pports || port_num < 1) {  in get_cable_info()
675 		ret = -EINVAL;  in get_cable_info()
679 	ppd = dd->pport + (port_num - 1);  in get_cable_info()
681 		ret = -ENODEV;  in get_cable_info()
685 	if (!ppd->qsfp_info.cache_valid) {  in get_cable_info()
686 		ret = -EINVAL;  in get_cable_info()
690 	if (addr >= (QSFP_MAX_NUM_PAGES * 128)) {  in get_cable_info()
691 		ret = -ERANGE;  in get_cable_info()
695 	if ((addr + len) > (QSFP_MAX_NUM_PAGES * 128)) {  in get_cable_info()
696 		excess_len = (addr + len) - (QSFP_MAX_NUM_PAGES * 128);  in get_cable_info()
697 		memcpy(data, &ppd->qsfp_info.cache[addr], (len - excess_len));  in get_cable_info()
698 		data += (len - excess_len);  in get_cable_info()
702 	memcpy(data, &ppd->qsfp_info.cache[addr], len);  in get_cable_info()
704 	if (addr <= QSFP_MONITOR_VAL_END &&  in get_cable_info()
705 	    (addr + len) >= QSFP_MONITOR_VAL_START) {  in get_cable_info()
707 		if (addr < QSFP_MONITOR_VAL_START) {  in get_cable_info()
708 			if (addr + len <= QSFP_MONITOR_VAL_END)  in get_cable_info()
709 				len = addr + len - QSFP_MONITOR_VAL_START;  in get_cable_info()
712 			offset = QSFP_MONITOR_VAL_START - addr;  in get_cable_info()
713 			addr = QSFP_MONITOR_VAL_START;  in get_cable_info()
714 		} else if (addr == QSFP_MONITOR_VAL_START) {  in get_cable_info()
716 			if (addr + len > QSFP_MONITOR_VAL_END)  in get_cable_info()
720 			if (addr + len > QSFP_MONITOR_VAL_END)  in get_cable_info()
721 				len = QSFP_MONITOR_VAL_END - addr + 1;  in get_cable_info()
724 		ret = one_qsfp_read(ppd, dd->hfi1_id, addr, data + offset, len);  in get_cable_info()
726 			ret = -EAGAIN;  in get_cable_info()
750 	u8 *cache = &ppd->qsfp_info.cache[0];  in qsfp_dump()
763 	if (ppd->qsfp_info.cache_valid) {  in qsfp_dump()
769 		sofar += scnprintf(buf + sofar, len - sofar, "PWR:%.3sW\n",  in qsfp_dump()
772 		sofar += scnprintf(buf + sofar, len - sofar, "TECH:%s%s\n",  in qsfp_dump()
776 		sofar += scnprintf(buf + sofar, len - sofar, "Vendor:%.*s\n",  in qsfp_dump()
779 		sofar += scnprintf(buf + sofar, len - sofar, "OUI:%06X\n",  in qsfp_dump()
782 		sofar += scnprintf(buf + sofar, len - sofar, "Part#:%.*s\n",  in qsfp_dump()
785 		sofar += scnprintf(buf + sofar, len - sofar, "Rev:%.*s\n",  in qsfp_dump()
789 			sofar += scnprintf(buf + sofar, len - sofar,  in qsfp_dump()
794 		sofar += scnprintf(buf + sofar, len - sofar, "Serial:%.*s\n",  in qsfp_dump()
797 		sofar += scnprintf(buf + sofar, len - sofar, "Date:%.*s\n",  in qsfp_dump()
800 		sofar += scnprintf(buf + sofar, len - sofar, "Lot:%.*s\n",  in qsfp_dump()
808 				sofar += scnprintf(buf + sofar, len - sofar,  in qsfp_dump()
811 			sofar += scnprintf(buf + sofar, len - sofar, "\n");  in qsfp_dump()